Dumaan nung 25 December 2024 to say hi sa mga earthlings.
Dadaan muli daw sa taong 2028. At posibleng sumalpok sa earth(airburst) o sa buwan(impact crater) sa taong 2032.
You do not have permission to view the full content of this post.
Log in or register now.
Snippet:
"The discovery triggered the first step in planetary defense responses, prompting several major telescopes to gather data about the object and leading United Nations-endorsed space agencies to begin planning asteroid threat mitigation.[14][15][16]
The asteroid made a close approach of 828,800 kilometres (515,000 miles; 2.156 lunar distances) to Earth on 25 December 2024 (two days before its discovery) and is now moving away. Its next close approach is expected around 17 December 2028.[3] From early April 2025 until June 2028, 2024 YR4 will be too distant for ground-based telescopes to observe. However, space-based infrared telescopes could continue monitoring it during some of this period.[16][17] For example, the James Webb Space Telescope is scheduled to observe the asteroid between March and May 2025.[18] Preliminary analysis of spectra and photometric time series suggests the asteroid is a stony S-type (most likely), L-type asteroid, or K-type asteroid with a rotation period of approximately 19.5 minutes.[8]"
For comparison.
Impact effect
Impact risk corridor for the 2032 approach.
"The risk corridor of 2024 YR4's possible impact locations runs from the eastern equatorial Pacific Ocean to Northern South America, the equatorial Atlantic Ocean, Nigeria, central Africa, the north of east Africa, the southwest corner of the Arabian peninsula, the Northwestern Indian Ocean, India, and ends in Bangladesh.[23][16] Using NASA's estimated diameter, mass, and density for 2024 YR4, the asteroid would release energy equivalent to 7.7 megatonnes of TNT (32.2 PJ) if it were to impact Earth at its predicted velocity at atmosphere entry of 17.32 km/s (10.76 mi/s),[7] equivalent to about 367 of the "Fat Man" bomb dropped on Nagasaki, 2 and a half of Grapple Y, 51% of Castle Bravo, or 15.4% of Tsar Bomba. Due to its stony composition, this would more likely produce a meteor air burst than an impact crater (for an impact on a continent) or tsunami (for an oceanic impact). It could cause damage as far as 50 km (30 mi) from the impact site.[20][25] Despite its potential to cause damage if it were to impact, 2024 YR4 is not categorized as a potentially hazardous object (PHO) because it has an absolute magnitude dimmer than 22, which usually means that such an asteroid is less than 140 m (460 ft) in diameter and its potential damage therefore would be localized.[27]"
"Moon
According to David Rankin, an operations engineer for the University of Arizona's Catalina Sky Survey, 2024 YR4 has a 0.3% probability of impacting the Moon on 22 December 2032 around 15:17 UT. The effects of the collision could create an impact crater around 500 to 2,000 meters wide on the lunar surface, releasing about 5.2 megatonnes of TNT (21.6 PJ) of energy if it were to impact the Moon at a velocity estimated to be 13.89 km/s (8.63 mi/s), an explosion 343 times more powerful than the atomic bomb dropped on Hiroshima. The potential impact zone extends from just below Mare Crisium, a solidified lava plain, to Tycho, an ancient crater, all located on the visible side of the Moon.
Michael Busch of the SETI Institute, notes that an explosion on the Moon "would be very obvious to any spacecraft observing from lunar orbit" but may not be as visible to the unaided eye from Earth due to the Moon’s brightness. However, other astronomers believe the impact could be visible from Earth. Gareth Collins suggested that "the impact flash of vaporized rock would be visible from Earth, even in the daytime", while Daniel Bamberger of the Northolt Branch Observatories in London stated that the impact "could be brighter than the full moon" making it clearly visible to the näked eye. [28][29]"
"2028
Observations of the asteroid when it passes near Earth again in 2028 will enable the calculation of a very precise orbit and a much refined estimation of the impact likelihood in 2032 as it will extend the observation arc by four years. The asteroid will be too faint for observation until June 2028.[16] It will be about magnitude 25 when it comes to opposition around 19 July 2028 at an Earth distance of 0.78 AU (117 million km) but it will continue to get closer until December 17 when it will be 20 lunar distances away.[3] If the 2028 observations do not rule out a 2032 impact, then an asteroid redirect mission similar to DART could be sent to 2024 YR4 to avert its impact.[37]"
PH
